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Does the length of your cycle affect your due date?

I went on 2 web sites and of course got 2 different due dates. Most are calculated on a 28 day cycle. I've always been on a 26 day cycle and 1 site asked for that information. Can the shorter cycle really change the due date?

It would put ovulation a few days earlier so it could only change the due date by a day or so. Not really a big deal. Most babies don't really know when they are due anyway and come when they feel like it.

it would change what day you actually conceived so the technical due date would be different by a couple days... most drs don't ask you how long your cycle is and they will give you a different due date based on your ultrasound measurements too... just take the due date as a rough estimate because the baby will come when they feel like it haha